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Cheap flights from London Gatwick Airport to Washington, D.C. from $487

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 5/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Gatwick Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$528Icelandair
Wed, May 13 - Wed, Jun 3
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$533Icelandair
Tue, Apr 21 - Wed, Jul 1
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$534Icelandair
Sun, Apr 19 - Fri, Jun 26
Icelandair Logo
1:00 pm - 7:20 pm
LGW
-
IAD
11h 20m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$538Icelandair
Tue, May 12 - Sun, Jun 7
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$539Icelandair
Mon, May 18 - Fri, May 22
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$541Icelandair
Wed, May 20 - Sat, May 30
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$542Icelandair
Mon, May 18 - Sat, May 30
Multiple Airlines Logo
2:00 pm - 7:24 am
LGW
-
IAD
22h 24m
1 stop
Multiple Airlines Logo
6:30 am - 10:00 am
IAD
-
LGW
23h 30m
2 stops
$545Multiple Airlines
Thu, Mar 5 - Thu, Mar 19
SWISS Logo
6:40 pm - 3:05 pm
LGW
-
IAD
25h 25m
1 stop
SWISS Logo
8:30 pm - 5:50 pm
IAD
-
LGW
16h 20m
1 stop
$546SWISS
Sat, Feb 28 - Sat, Mar 7
SWISS Logo
6:40 pm - 4:40 pm
LGW
-
IAD
27h 00m
1 stop
SWISS Logo
9:30 pm - 5:50 pm
IAD
-
LGW
16h 20m
1 stop
$550SWISS
Thu, Mar 5 - Thu, Mar 19

Icelandair flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
May 13
LGW3:40 pmLondon Gatwick
11h 35m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
Jun 3
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
$528
Icelandair
Apr 21
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Jul 1
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
$533
Icelandair
Apr 19
LGW3:40 pmLondon Gatwick
32h 40m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Jun 26
IAD11:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
LGW2:40 pmLondon Gatwick
$534

SWISS flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
Feb 28
LGW6:40 pmLondon Gatwick
25h 25m
1 stop
IAD3:05 pmWashington, D.C. Dulles Intl
Mar 7
IAD8:30 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
LGW5:50 pmLondon Gatwick
$546
SWISS
Mar 5
LGW6:40 pmLondon Gatwick
27h 00m
1 stop
IAD4:40 pmWashington, D.C. Dulles Intl
Mar 19
IAD9:30 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
LGW5:50 pmLondon Gatwick
$550
SWISS
Feb 27
LGW6:40 pmLondon Gatwick
27h 00m
1 stop
IAD4:40 pmWashington, D.C. Dulles Intl
Mar 3
IAD8:30 pmWashington, D.C. Dulles Intl
16h 20m
1 stop
LGW5:50 pmLondon Gatwick
$554

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 5/13

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 6/3

11:20 pm-2:40 pm

1 stop10h 20m

$528

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 4/21

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 7/1

11:20 pm-2:40 pm

1 stop10h 20m

$533

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 4/19

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Fri 6/26

11:20 pm-2:40 pm

1 stop10h 20m

$534

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 5/12

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Sun 6/7

11:20 pm-2:40 pm

1 stop10h 20m

$538

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 5/18

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Fri 5/22

11:20 pm-2:40 pm

1 stop10h 20m

$539

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 5/20

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 5/30

8:30 pm-11:45 am

1 stop10h 15m

$541

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 5/18

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sat 5/30

8:30 pm-11:45 am

1 stop10h 15m

$542

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 3/5

2:00 pm-7:24 am

1 stop22h 24m

Washington, D.C. Dulles Intl

Thu 3/19

6:30 am-10:00 am

2 stops23h 30m

$545

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 2/28

6:40 pm-3:05 pm

1 stop25h 25m

Washington, D.C. Dulles Intl

Sat 3/7

8:30 pm-5:50 pm

1 stop16h 20m

$546

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 3/5

6:40 pm-4:40 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Thu 3/19

9:30 pm-5:50 pm

1 stop16h 20m

$550

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $749. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $883.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $818 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $849 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Fastest flight time

11h 20m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 20m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Laurel
Colonial Beach
Tysons
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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